Stovepipe-thimble.



IIO

Unr'rnn Sterns Aram* WILLIAM T. SANFORD, OF LAKEVILLE, MASSACHUSETTS. l

sTovsPlPE-THIMBLE.

SPECIFICATION forming part of Letters Patent No. 670,063, dated March19, 1901.

Application filed May 29, 1900- Serial No. 18,475. (No model.)

To @ZZ whont it' may concern.-

Be it known that I, WILLIAM T. SANFORD, a

citizen of the United States, residing at Lakeville, in the county ofPlymouth and State of Massachusetts, have invented a new and usefulStovepipe-Thimble, of which the following is a specification...

This invention relates to improvements in stovepipe-thimbles; andtheobject thereof is to provide a device of this character having meanswhereby the draft of the stove may be regulated as desired without thenecessity of having a damper in the stovepipe.

The preferred form of the invention is described in the followingspecification and shown in the drawings which accompany the same, and inwhich- Figure 1 is a View of a portion of a chimney, showing myinvention applied thereto. Fig. 2 is a perspective view of the devicedetached from the chimney with the casing removed. Fig. 3 is alongitudinal section. Fig. t is a cross-section on the line fr of Fig.3.

Theinvention consists,essentially,ofathimble'comprising a boxing, oneend of which is provided with a stovepipe-opening, the other end havinga damper and operating mechanism arranged upon the boxing and connectedwith the damper, whereby the latter may be adjusted to regulate theopening into the chimney.

In the drawings, 10 designates the boxing, which is preferablyrectangular in cross-section. The front wall of the boxing is providedwith the circular stovepipe-opening 12, and this wall preferably extendson all sides beyond the walls of the boxing, forminga facing-plate 13,adapted to rest against the wall of the chimney. The rear end of theboxing is provided along its vertical inner edges with pairs of iianges14, which form guideways 15 for the damper 16, that is arranged to slidevertically in said guideways,and thereby open and close this end of theboxing. The damper 16 preferably comprises a flat metal plate havingcut-away portions in its lower end, forming draft-openings 18.

In order to raise and lower the damper, an operating-shaft 19 isprovided, which is arranged above the boxing, being supported at one endby the journal-bracket 20 and the other end extending through the upperportion of the facing-plate 13. The rear end of this shaft is providedwith a pinion 21, that engages the vertical rack 22, arranged on theinner face of the damper 16. The projecting end of the shaft 19 isprovided with an operating-wheel 23, and a ratchet-disk 24 is interposedbetween this w heel and the facing-plate, said ratchet-wheel beingengaged by a dog 25, pivotally mounted upon the facing-plate and havingan operating-handle 26.

In order to protect the operating mechanism from soot and cinders, acasing 27 is provided. This casing preferably comprises a sheet-metalplate bent to a circular form and covering the shaft 19 and pinion 21.The edges of the casing are provided with outwardlybent flanges, whichare adapted to be sprung under the keepers 28, arranged on the top ofthe boxing. An opening 29 is arranged at the rear end of the boxing,which allows the rack 22 free movement through the casing.

In order to close the pipe-opening 12 when not in use, a fiat metalplate circular in form and slightly larger in diameter-than the openingis provided. The opposite side portions are cut away, as at 30, formingthe abut-V ments 3l, which are preferably beveled at their lower edgesand fit in correspondinglybeveled keepers arranged on opposite sides ofthe openings. It will be evident that when this cover is slipped intoplace on account of the beveled keepers it will he held in close contactto the face-plate and completely close the opening.

In the operation of the device itwill be evident that by rotating theoperating-wheel the damper may be raised or lowered as desired and willbe held at the proper adjustment by the dog engaging in theratchet-wheel.

It will thus be Seen that a damper is provided direetly in the thimble,whereby the necessity of one in the pipe is obviated. Furthermore, theoperating mechanism is arranged outside of the thimble and iscoinpletely protected from the dirt, smoke, and cinders.

From the foregoing it is thought that the construction, operation, andmany advantages of the herein-described invention will IOO be apparentto those skilled in the art without further description, and it will beunderstood that various changes in the size, shape, proportion, andminor details of construction may be resorted to Without departing fromthe spirit or sacrificing any of the advantages of the invention.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A stovepipe-thimble, comprising a boxing having open ends, a damperslidably mounted upon one end, and an operatingshaft mounted exterior tothe boxing and operatively connected with the damper to provide forasliding movement thereof, whereby the latter may be operated toregulate the draft through the boxing, substantially as described.

2. Ast-ovepipe-thimblecomprisingan openended boxing, a damper slidablymounted upon one end of the boxing, an operatingshaft mounted upon theoutside of the boxevopee ing and operatively connected with the damper,and a casing connected to the boxing and arranged to house the operatingmechanism for said damper, substantially as described.

3. Astovepipe-thimble comprising an openended boxing, a damper slidablymounted upon one end of the boxingand provided with a rack, anoperating-shaft journaled upon the boxing, one end of said shaft beingprovided with a pinion which engages the rack, the other end of saidshaft being provided with an operatin g device,and a casing forsaidshaft and pinion, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

WILLIAM T. SANFORD.

Witnesses:

GEORGE W. STErsoN, SARAH B. KINGMAN.

